The Forerunner

Made it ‘till about the 40% mark

This just isn't very good. The Pre-iskai stuff are interesting and well written, then we arrive in the new world and everything falls completely flat. Imagine the most generic isekai anime you can imagine and boom.

During the first couple of days the mc gets: super healing, strength, speed, intelligence, all knowledge of both earth and the new world, is able to control all elements and is able to create custom force barriers. All locals are pretty much npc's and barely question his existence...

There's just nothing interesting here.